On the broader scope, guessing if things do continue to get done eventually every season will be represented with a mod replicating the tracks, cars, and drivers of that year.

It depends on someone whose enthusiasm compels them to step up and get done what they want done.
So far, an incredible amount of work has already been done and truly amazing things have been accomplished.

Have learned to believe them when editors say you ain't seen nothing yet.

There would even be more behind the courtain. But as Rob said the team does not want to raise expectations by showing pictures of mods in an early stage as the editing team is small and time is limited.